Modified frequency modulation (MFM) is a run-length limited (RLL) line code used to encode data on most floppy disks and some hard disk drives. It was...
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Another purpose of modulation is to transmit multiple channels of information through a single communication medium, using frequency-division multiplexing...
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a 5+1⁄4-inch disk. IBM began introducing the more efficient modified frequency modulation, or MFM, starting in 1970. They referred to this format as "double...
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carrier wave. Phase modulation is one of the two principal forms of angle modulation, together with frequency modulation. In phase modulation, the instantaneous...
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Line code (redirect from Digital frequency modulation)
Manchester Mark and space MLT-3 encoding Modified AMI codes: B8ZS, B6ZS, B3ZS, HDB3 Modified frequency modulation, Miller encoding and delay encoding Non-return-to-zero...
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Carrier wave (redirect from Carrier frequency)
more of its properties modified (the called modulation) by an information-bearing signal (called the message signal or modulation signal) for the purpose...
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quality compared to the previous frequency-division multiplexing schemes. In 1973, adaptive differential pulse-code modulation (ADPCM) was developed, by P...
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Pulse-width modulation (PWM), also known as pulse-duration modulation (PDM) or pulse-length modulation (PLM), is any method of representing a signal as...
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In electronics, ring modulation is a signal processing function, an implementation of frequency mixing, in which two signals are combined to yield an output...
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Encoding schemes used included Frequency modulation (FM), Modified Frequency Modulation (MFM) and RLL encoding at frequencies for example ranging from 0.156 MHz...
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interchange on 90 mm (3,5 in) flexible disk cartridges using modified frequency modulation recording at 15 916 ftprad, on 80 tracks on each side) is a...
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Sound, a UK radio station MFM Radio, a French radio station Modified frequency modulation, a data encoding method used on floppy disks and older hard...
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Delta modulation (DM or Δ-modulation) is an analog-to-digital and digital-to-analog signal conversion technique used for transmission of voice information...
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earliest and simplest variants were given specific names, such as modified frequency modulation (MFM), and the name "RLL" is commonly used only for the more...
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They were typically implemented on a separate controller card. Modified frequency modulation (MFM) controllers were the most common type in small computers...
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Hierarchy signals Eight-to-Fourteen Modulation 4B5B 8b/10b encoding 64b/66b encoding HDLC Modified Frequency Modulation Anisochronous Morse code Asynchronous...
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Differential Manchester encoding (DM) is a line code in digital frequency modulation in which data and clock signals are combined to form a single two-level...
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number of mechanisms exist for obtaining an optical frequency comb, including periodic modulation (in amplitude and/or phase) of a continuous-wave laser...
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The modified Allan variance (MVAR), also known as mod σy2(τ), is a variable bandwidth modified variant of Allan variance, a measurement of frequency stability...
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with an improved line code, such as modified frequency modulation (MFM), modified modified frequency modulation (M²FM), FM/MFM or group coded recording...
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Angle modulation is a class of carrier modulation that is used in telecommunications transmission systems. The class comprises frequency modulation (FM)...
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Incremental frequency keying, also known as IFK or IFK+, is a modified type of MFSK modulation where the data to be transmitted is represented by the difference...
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FM broadcasting (redirect from Frequency Modulation Radio)
FM broadcasting is a method of radio broadcasting that uses frequency modulation (FM) of the radio broadcast carrier wave. Invented in 1933 by American...
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MFC—Microsoft Foundation Classes MFT—Master File Table MFM—Modified Frequency Modulation MF—Medium Frequency MGCP—Media Gateway Control Protocol MHz—Megahertz...
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interchange on 130 mm (5.25 in) flexible disk cartridges using modified frequency modulation recording at 7 958 ftprad, 3,8 tpmm (96 tpi), on both sides...
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through long distances. In general, video modulation means that a higher frequency carrier wave is modified according to the original video signal. In...
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audio (44,100 Hz sampling rate and 16-bit resolution) using modified frequency modulation encoding. In September 1978, the company demonstrated an optical...
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AM broadcasting (redirect from Amplitude modulation broadcasting)
AM radio's audiences declined greatly due to competition from FM (frequency modulation) radio, Digital Audio Broadcasting (DAB), satellite radio, HD (digital)...
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ISO/IEC 18000-3 (category Radio-frequency identification)
rate. The command data rate is 423.75 kbit/s encoded using modified frequency modulation (MFM). Tags reply to the interrogator by inductive coupling...
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encoding schemes such as differential Manchester encoding (DM), modified frequency modulation (MFM), M2FM and group coded recording (GCR). The 5¼-inch format...
79 KB (8,705 words) - 20:09, 25 August 2024